nomadseason

September Weather in Castrillon, Spain

Last updated: August 27, 2025

In September, the average temperature in Castrillon, Spain hovers around 17°C (64°F). Expect a minimum of 9°C (49°F) and a maximum of 29°C (84°F) during this time. Prepare for 90 mm (3.5 in) of precipitation spread across 14 days, contributing to an average humidity of 77%.

September Temperature in Castrillon

In September in Castrillon, the average temperature is 17°C (64°F). Maximums can reach 29°C (84°F), and minimums can drop to as low as 9°C (49°F). This mild weather makes it an ideal time for exploring the beauty of Castrillon.

September Weather in Castrillon: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Castrillon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castrillon, September typically has an average temperature of 17°C (64°F), with highs reaching up to 29°C (84°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec475051535761656663595351
Data source: Temperature data for Castrillon generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Castrillon

In Castrillon in September, the precipitation amount is 90 mm (3.5 in) spread over a total of 14 days.

September Precipitation Trends in Castrillon

The chart displays monthly precipitation patterns in Castrillon, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Castrillon, September typically receives around 90 mm (3.5 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec1091139698106125788490125179186
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Castrillon

In Castrillon in September, humidity is 77%. With an average temperature of 17°C (64°F), this humidity feels like a warm embrace, making traveling somewhat uncomfortable as the air can feel thick and heavy, causing sweat to linger on your skin and making you long for a refreshing breeze.

September Average Humidity in Castrillon

This chart illustrates the average monthly humidity levels in Castrillon, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Castrillon is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%83%83%84%84%86%78%77%82%86%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Castrillon

In Castrillon in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Castrillon.

Maximum UV Index Levels in Castrillon for September

The chart shows the monthly maximum UV Index (UVI) for Castrillon in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Castrillon typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910997532
Data source: Castrillon September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Castrillon Compares to Other Months

Weather in Castrillon varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Castrillon, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Castrillon, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)109 mm (4.3 inches)87%low
February Weather10°C (50°F)113 mm (4.5 inches)85%moderate
March Weather10°C (51°F)96 mm (3.8 inches)83%moderate
April Weather12°C (53°F)98 mm (3.9 inches)83%high
May Weather14°C (58°F)106 mm (4.2 inches)84%very high
June Weather16°C (62°F)125 mm (4.9 inches)84%very high
July Weather18°C (65°F)78 mm (3.1 inches)86%very high
August Weather19°C (66°F)84 mm (3.3 inches)78%very high
September Weather17°C (64°F)90 mm (3.5 inches)77%high
October Weather15°C (59°F)125 mm (4.9 inches)82%moderate
November Weather11°C (53°F)179 mm (7.1 inches)86%moderate
December Weather10°C (51°F)186 mm (7.3 inches)87%low

Compare Castrillon's Climate with Cities Worldwide